given the money, the space and playing shows, i'd have a two very similar systems. i had a cab blow out just before a show, and had to scramble to borrow another cab with less than 24 hours to go and future shows on the calendar. it was nice that the manufacturer repaired it, but i wanted for months. having a second sytem would have been very useful.
also sometimes two rigs may be the same on paper, but may sound different or have different features good for different types of music.
also sometimes two rigs may be the same on paper, but may sound different or have different features good for different types of music.